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7 results on '"Xian Huang"'

1. Highly stereoselective three-component reactions of phenylselenomagnesium bromide, acetylenic sulfones, and saturated aldehydes/ketones or alpha,beta-unsaturated enals or enones

Author

Xian Huang and Meihua Xie

Subjects
Chemistry, Organic -- Research, Bromides, Stereochemistry -- Research, Chemical reactions -- Analysis, Aldehydes, Ketones, Sulfones, Carbonyl compounds, Acetylene, Biological sciences, Chemistry
Abstract

Research has been conducted on beta-phenylseleno-alpha-tolylsulfonyl-substituted alkenes. The synthesis of these compounds carried out via the three-component conjugated-nucleophilic addition of acetylenic sulfones, phenylselenomagnesium bromide and carbonyl compounds is described.

Published
2002

2. Unexpected Formation of (E)-4-Alkene 1,3-Diketones from the Three-Component Reaction of Lithium Selenolates with 1-(1-Alkynyl)cyclopropyl Ketones and Aldehydes

Author

Luling Wu, Jianfeng Xu, and Xian Huang

Subjects
Diketone, chemistry.chemical_classification, Aldehydes, Ketone, Molecular Structure, Double bond, Chemistry, Alkene, Organic Chemistry, chemistry.chemical_element, Stereoisomerism, Alkenes, Ketones, Lithium, Medicinal chemistry, Aldehyde, Chemical synthesis, Selenium, Organometallic Compounds, Single bond
Abstract

A novel three-component stereoselective synthesis of (E)-4-alkene 1,3-diketones from lithium selenolates, 1-(1-alkynyl)cyclopropyl ketones, and aldehydes is reported. This reaction afforded the products in moderate to good yields with the formation of a new C-Se single bond, a new C-C double bond, and a new C-O double bond.

Published
2011

3. Chemoselective synthesis of highly substituted 1,2-allenyl ketones, furans, and 2-alkynyl ketones from reaction of lithium selenolates with 1-(1-alkynyl)cyclopropyl ketones and electrophiles

Author

Luling Wu, Xian Huang, Shugao Zhu, and Jianfeng Xu

Subjects
Models, Molecular, Addition reaction, Molecular Structure, Organic Chemistry, Halide, chemistry.chemical_element, Stereoisomerism, Ketones, Lithium, Biochemistry, Selenium, chemistry, Electrophile, Organometallic Compounds, Organic chemistry, Physical and Theoretical Chemistry, Furans
Abstract

A homo-Michael addition reaction of lithium selenolates with 1-(1-alkynyl)cyclopropyl ketones and the subsequent reaction with electrophiles such as PhSeBr, NFSI and NCS is reported. Based on the nature of electrophiles, this reaction may afford highly substituted 1,2-allenyl ketones or furans (E(+) = PhSe(+)) and 2-alkynyl ketones (E(+) = F(+), Cl(+), active halides) as the final products, respectively.

Published
2012

4. CAN-Mediated Highly Regio- and Stereoselective Oxidation of Vinylidenecyclopropanes: A Novel Method for the Synthesis of Unsymmetrical Divinyl Ketone and Functional Enone Derivatives.

Author

Chenliang Su, Xian Huang, and Qingyang Liu

Subjects
*OXIDATION, *KETONES, *CARBONYL compounds, *CHEMICAL reactions, *CYCLOPROPANE, *CHARGE exchange, *PHOTOSYNTHETIC oxygen evolution
Abstract

CAN-mediated oxidative rearrangement of various vinylidenecyclopropanes under mild conditions generates unsymmetrical divinyl ketone and functional enone derivatives in moderate to good yields with excellent regio- and stereoselectivities. The reaction mechanism was investigated on the basis of an oxygen-18 tracer experiment. [ABSTRACT FROM AUTHOR]

Published
2008
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5. Acylation of Alkylidenecyclopropanes for the Facile Synthesis of ,-Unsaturated Ketone and Benzofulvene Derivatives with High Stereoselectivity.

Author

Xian Huang and Yewei Yang

Subjects
*ACYLATION, *KETONES, *CHLORIDES, *STEREOCHEMISTRY
Abstract

A variety of substituted ,-unsaturated ketone and benzofulvene derivatives were readily prepared in good to excellent yields via the reaction of alkylidenecyclopropanes with various acyl chlorides in the presence of aluminum chloride. The stereochemistry of the acylation and cyclization is discussed. [ABSTRACT FROM AUTHOR]

Published
2007
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7. Unexpected Formation of (E)-4-Alkene 1,3-Diketones from the Three-Component Reaction of Lithium Selenolates with 1-(1-Alkynyl)cyclopropyl Ketones and Aldehydes.

Author

Jianfeng Xu, Luling Wu, and Xian Huang

Subjects
*ALKENES, *KETONES, *LITHIUM, *CHEMICAL bonds, *ALDEHYDES
Abstract

A novel three-component stereoselective synthesis of (E)-4-alkene 1,3-diketones from lithium selenolates, 1-(1-alkynyl)cyclopropyl ketones, and aldehydes is reported. This reaction afforded the products in moderate to good yields with the formation of a new C-Se single bond, a new C-C double bond, and a new C-O double bond. [ABSTRACT FROM AUTHOR]

Published
2011
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